Chelsea are set to add another D. Costa to their books (Picture: Getty)

Chelsea manager Jose Mourinho has reacted to his side’s Champions League elimination by reportedly agreeing an £18 million transfer deal for Brazilian international Douglas Costa.

The Shakhtar Donetsk midfielder has been strongly linked with a move to the Blues in recent weeks, and recently expressed his belief that teaming up with Mourinho would allow him to achieve everything he wants to in football.

And according to the Sun, the 24-year-old’s wishes will be granted after he agreed in principle to move to Stamford Bridge at the end of the season.

The news comes amid a slump in form for the Blues, and while the Premier League title still seems a formality for Mourinho’s side, Costa’s move suggests the Portuguese still isn’t entirely satisfied with his squad.